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A091611 Column 1 of triangle A091604. 1
1, 2, 4, 6, 10, 17, 25, 38, 57, 84, 120, 174, 243, 342, 472, 650, 882, 1200, 1605, 2150, 2848, 3767, 4937, 6467, 8396, 10891, 14032, 18046, 23073, 29458, 37405, 47421, 59850, 75396, 94601, 118501, 147888, 184254, 228823, 283677, 350655, 432737 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..42.

CROSSREFS

Sequence in context: A204656 A070689 A339312 * A107742 A228779 A158510

Adjacent sequences:  A091608 A091609 A091610 * A091612 A091613 A091614

KEYWORD

nonn

AUTHOR

Christian G. Bower, Jan 23 2004

STATUS

approved

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Last modified December 2 07:02 EST 2021. Contains 349437 sequences. (Running on oeis4.)