login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A081301 Subdiagonal of square array A081297. 5
1, 1, 13, 41, 991, 5461, 194713, 1545265, 73022131, 758924981, 44709567013, 575279386969, 40614439994311, 623479972408021, 51316625644764721, 915589327332039905, 86090052046429522747, 1750836276286883890741 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

FORMULA

a(n)=((n+2)^(n+1)-(-(n+1))^(n+1))/(2n+3).

CROSSREFS

Cf. A081298, A081299, A081300, A081302.

Sequence in context: A116153 A116209 A002673 * A159527 A139277 A162265

Adjacent sequences:  A081298 A081299 A081300 * A081302 A081303 A081304

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Mar 17 2003

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 14 15:32 EST 2012. Contains 205635 sequences.