The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A014719 Squares of elements in Pascal triangle (by row) that are not 1. 1
 4, 9, 9, 16, 36, 16, 25, 100, 100, 25, 36, 225, 400, 225, 36, 49, 441, 1225, 1225, 441, 49, 64, 784, 3136, 4900, 3136, 784, 64, 81, 1296, 7056, 15876, 15876, 7056, 1296, 81, 100, 2025, 14400, 44100, 63504, 44100, 14400, 2025, 100, 121, 3025 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 COMMENTS Number of ways to place 2k*(n-k) nonattacking ferses on a 2k X (2n-2k) board. - Tricia Muldoon Brown, Dec 12 2018 LINKS Vincenzo Librandi, Table of n, a(n) for n = 2..5461 Tricia Muldoon Brown, The Problem of Pawns, arXiv:1811.09606 [math.CO], 2018. FORMULA a(n) = A014410(n)^2. - Sean A. Irvine, Nov 18 2018 EXAMPLE Triangle begins:   4,   9, 9,   16, 36, 16,   25, 100, 100, 25,   36, 225, 400, 225, 36,   ... MAPLE T:=(n, k)->binomial(n, k)^2: seq(seq(T(n, k), k=1..n-1), n=2..11); # Muniru A Asiru, Dec 12 2018 MATHEMATICA Select[Flatten[Table[Binomial[n, i]^2, {n, 0, 25}, {i, 0, n}]], #>1 &] (* Vincenzo Librandi, Nov 19 2018 *) CROSSREFS Cf. A007318, A014410. Sequence in context: A140978 A106410 A065737 * A139417 A329732 A298816 Adjacent sequences:  A014716 A014717 A014718 * A014720 A014721 A014722 KEYWORD nonn,tabl AUTHOR EXTENSIONS More terms from Sean A. Irvine, Nov 18 2018 Offset corrected by Joerg Arndt, Nov 19 2018 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 5 18:37 EDT 2021. Contains 343573 sequences. (Running on oeis4.)