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A032018 Shifts left under "AGJ" (ordered, elements, labeled) transform. 0
1, 1, 1, 7, 15, 105, 855, 7855, 58915, 642385, 9004755, 115824435, 1604808065, 25144782705, 455128178085, 8168562081915, 158166596302055, 3295573475438405, 73982086933664855, 1712715517531862335, 41970840045144861565, 1087768715565961794905 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..22.

CROSSREFS

Sequence in context: A231399 A231466 A032004 * A243470 A068366 A156499

Adjacent sequences:  A032015 A032016 A032017 * A032019 A032020 A032021

KEYWORD

nonn,eigen

AUTHOR

Christian G. Bower

EXTENSIONS

More terms from Sean A. Irvine, May 07 2020

STATUS

approved

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Last modified May 18 10:19 EDT 2021. Contains 343995 sequences. (Running on oeis4.)