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A302408 Number of n step self-avoiding walks on 3 X infinity grid starting from (0,0). 4
1, 3, 7, 18, 40, 86, 170, 350, 688, 1394, 2702, 5338, 10278, 20078, 38578, 74820, 143496, 276890, 530626, 1020774, 1955400, 3754560, 7190520, 13790666, 26407852, 50612412, 96911566, 185660272, 355485362, 680860212, 1303623528, 2496462996 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Sean A. Irvine, Table of n, a(n) for n = 0..39

CROSSREFS

Cf. A007825 (starting from (0,1)), A038577, A001411.

Sequence in context: A197182 A074587 A208715 * A076700 A265007 A026533

Adjacent sequences:  A302405 A302406 A302407 * A302409 A302410 A302411

KEYWORD

nonn,walk

AUTHOR

Sean A. Irvine, Apr 07 2018

STATUS

approved

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Last modified September 20 11:47 EDT 2021. Contains 347584 sequences. (Running on oeis4.)