A377928 The indices k where A377015(k) = 1.

1, 2039, 2703, 30083, 32155, 32437, 86925, 292101, 339137, 430611, 669371, 670563, 727051, 1161819, 1534325, 1541819, 1543011, 2027935, 2718001, 3266661, 3273829, 3730467, 4805861, 4806143, 5534871, 6371063, 7834735, 8926025, 9293575, 9664815, 12629449, 13645059, 13645723, 16510691, 19947389, 19952425, 22519739, 22520381, 24820941, 26657853, 26658495

Offset

1,2

Comments

These are the indices where a knight moving on a square spiral revisits the origin using the path rules given in A377015. See that sequence for further details.

Links

Table of n, a(n) for n=1..41.

Crossrefs

Cf. A377015, A316667, A362027, A343678, A358278, A358150, A328929, A328909.

Sequence in context: A020413 A031806 A186045 * A258965 A250009 A015158

Adjacent sequences: A377925 A377926 A377927 * A377929 A377930 A377931

Keyword

nonn

Author

Scott R. Shannon, Nov 11 2024

Status

approved