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A211208 Sums of squares of terms in rows of Losanitsch's triangle (A034851). 2
1, 2, 3, 10, 26, 92, 282, 1044, 3558, 13436, 48578, 185516, 693332, 2667160, 10156772, 39277160, 151224134, 587138284, 2275980402, 8864583324, 34516282476, 134779569352, 526441907852, 2060002196632, 8065098605532, 31615272898392, 124004228696052 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Limit a(n+1)/a(n) = 4.

LINKS

Paul D. Hanna, Table of n, a(n) for n = 0..1000

FORMULA

  a(n) = Sum_{k=0..n} A034851(n,k)^2.

PROG

(PARI) {a(n)=sum(k=0, n, (binomial(n, k) + binomial(n%2, k%2) * binomial(n\2, k\2))^2/4)}

for(n=0, 30, print1(a(n), ", "))

CROSSREFS

Cf. A034851.

Sequence in context: A005158 A182926 A005225 * A238937 A278088 A052929

Adjacent sequences:  A211205 A211206 A211207 * A211209 A211210 A211211

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Feb 04 2013

STATUS

approved

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Last modified February 23 17:41 EST 2018. Contains 299584 sequences. (Running on oeis4.)