A109842 Number of consecutive integers starting with n needed to sum to a palindrome.

1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 34, 12, 6, 4, 2, 11, 12, 16, 7, 3, 1, 8, 9, 19, 6, 2, 8, 12, 15, 14, 3, 1, 12, 22, 3, 70, 2, 11, 22, 33, 9, 16, 1, 12, 3, 8, 6, 2, 2, 10, 8, 6, 4, 1, 3, 8, 6, 4, 2, 9, 11, 6, 4, 2, 1, 13, 33, 4, 2, 13, 7, 3, 29, 2, 8, 1, 32, 9, 2, 8, 7, 3, 11, 2, 11, 44, 1, 77, 2, 50

Offset

1,10

Comments

Here are the records ( n:a(n) ) - 1:1, 10:3, 12:34, 37:70, 89:77, 94:144, 123:273, 214:838, 244:2149, 326:2347, 365:11264, 1359:23099, 1427:30610, 3272:118846, 3572:136719,

Links

Table of n, a(n) for n=1..91.

Example

a(14)=6 because 14 + 15 + 16 + 17 + 18 + 19 = 99, 6 terms are needed.

Crossrefs

Cf. A109841.

Sequence in context: A113110 A317363 A190964 * A270101 A271288 A271276

Adjacent sequences: A109839 A109840 A109841 * A109843 A109844 A109845

Keyword

base,easy,nonn

Author

Jason Earls, Jul 05 2005

Status

approved