49087

Appears in sequences

• Area of annuli of consecutive integer thickness.at n=24A114378
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (0, 1, 1), (1, -1, 0), (1, 0, -1)}.at n=10A148924
• Number of partitions of n with difference 5 between the number of odd parts and the number of even parts, both counted without multiplicity.at n=46A242696
• a(n) = ((n+2)/2)*Sum_{k=0..n/2} (Sum_{i=0..n-2*k} (binomial(k+1,n-2*k-i)*binomial(k+i,k))/(k+1)*C(k)), where C(k) is Catalan numbers.at n=13A270724