A120310 See comments lines.

98, 72, 77, 49, 54, 20, 10, 1, 11, 2, 13, 4, 17, 8, 25, 7, 1, 2, 2, 6, 3, 12, 4, 20, 5, 15, 20, 13, 18, 11, 0, 0, 4, 9, 8, 18, 12, 27

Offset

1,1

Comments

Comment from Joshua Zucker, May 26 2007. This appears to be a concatenation of five puzzles:

98,72,77,49,54,20,25,10,15,5,10,0,5,5,10,0,5,5,10,0,... (start with 98, then write down the product of its digits, then add 5, repeat) - see A129887.

10,1,11,2,13,4,17,8,25,7,... (start with 10; write down the sum of its digits; add last two terms; repeat) - see A129888.

1,2,2,6,3,12,4,20,5,30,6,42,... (write down n, then n(n+1)) - see A129889.

15,20,13,18,11,16,9,14,... (interleave two arithmetic progressions of difference -2).

0,0,4,9,8,18,12,27,16,36,20,... (interleave two arithmetic progressions 0,4,8,12,... and 0,9,18,27,...)

Links

Table of n, a(n) for n=1..38.

Crossrefs

Sequence in context: A114430 A258765 A033418 * A129887 A205067 A307371

Adjacent sequences: A120307 A120308 A120309 * A120311 A120312 A120313

Keyword

nonn,dumb,unkn

Author

Sydney Richardson (AmyNStiers(AT)aol.com), Aug 16 2006

Status

approved