A036387 - OEIS

A036387

Number of connected numbers (A029827) with binary order (A029837) <= n.

0, 0, 0, 1, 1, 6, 14, 35, 77, 166, 346, 707, 1427, 2865, 5732, 11428, 22710, 45102, 89442, 177329, 351374, 696093, 1378860, 2731235, 5409540, 10715171, 21226041, 42050951, 83315605, 165092603, 327175955

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OFFSET

1,6

LINKS

Table of n, a(n) for n=1..31.

EXAMPLE

Below 64 the following six composite connected numbers occur: 15,45,51,55,57,63, so a(6)=6.

CROSSREFS

Cf. A029827, A007053 and A029837, A036378-A036390.

Sequence in context: A272116 A268275 A272548 * A053560 A229441 A119874

Adjacent sequences: A036384 A036385 A036386 * A036388 A036389 A036390

KEYWORD

nonn,more

AUTHOR

Labos Elemer

EXTENSIONS

a(21)-a(31) from Sean A. Irvine, Oct 29 2020

STATUS

approved