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A074136
Main diagonal of triangle A074135.
1
1, 4, 7, 13, 18, 21, 28, 40, 49, 64, 75, 81, 94, 115, 130, 138, 155, 182, 201, 211, 232, 265, 288, 300, 325, 364, 391, 433, 462, 477, 508, 556, 589, 606, 641, 695, 732, 751, 790, 850, 891, 912, 955, 1021, 1066, 1089, 1136, 1208, 1257, 1282, 1333, 1411, 1464
OFFSET
1,2
CROSSREFS
Cf. A074135.
Sequence in context: A049698 A288823 A310823 * A310824 A266811 A085787
KEYWORD
nonn,easy,less
AUTHOR
Amarnath Murthy, Aug 27 2002
STATUS
approved