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A087150 Monotonically increasing sequence of least positive integers, a(1)=1, such that the self-convolution produces all squares. 1
1, 2, 6, 20, 40, 42, 54, 90, 168, 236, 406, 712, 1094, 1602, 2240, 2970, 3690, 4874, 5008, 5710, 8338, 9714, 10496, 11314, 12812, 19924, 27678, 37748, 49142, 55996, 71438, 92420, 104866, 110158, 128642, 143030, 151098, 158264, 208234, 213902 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..40.

FORMULA

A087151(n)^2 = sum(k=1, n, a(k)*a(n-k+1)).

CROSSREFS

Cf. A087151.

Sequence in context: A218883 A202963 A130315 * A214307 A087134 A036689

Adjacent sequences:  A087147 A087148 A087149 * A087151 A087152 A087153

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Aug 19 2003

STATUS

approved

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Last modified October 19 12:29 EDT 2018. Contains 316360 sequences. (Running on oeis4.)