A032018 Shifts left under "AGJ" (ordered, elements, labeled) transform.

1, 1, 1, 7, 15, 105, 855, 7855, 58915, 642385, 9004755, 115824435, 1604808065, 25144782705, 455128178085, 8168562081915, 158166596302055, 3295573475438405, 73982086933664855, 1712715517531862335, 41970840045144861565, 1087768715565961794905

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