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A020642 n-th composite is sum of first k composites for some k. 0
1, 5, 10, 17, 33, 44, 56, 69, 82, 99, 116, 134, 175, 196, 242, 267, 321, 349, 377, 408, 442, 475, 507, 542, 581, 619, 659, 700, 741, 785, 966, 1015, 1065, 1111, 1167, 1273, 1329, 1383, 1563, 1622, 1687, 1751, 1949, 2017, 2084, 2159, 2231, 2302, 2375, 2449, 2685 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..51.

CROSSREFS

Cf. A013919, A013920, A013921.

Sequence in context: A086653 A215449 A174062 * A067253 A284703 A048822

Adjacent sequences:  A020639 A020640 A020641 * A020643 A020644 A020645

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Henri Lifchitz, David W. Wilson

STATUS

approved

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Last modified December 17 14:12 EST 2018. Contains 318201 sequences. (Running on oeis4.)