51125

Appears in sequences

• Small-number statistic from the enumeration of domino tilings of a 9-pillow of order n.at n=17A112844
• Number of -2..2 arrays of n elements with first through fourth differences also in -2..2.at n=14A202658
• k such that 0 = Sum_{j=1..k} A373223(k, j). The indices of the rows in Gauss's triangle with vanishing row sums.at n=39A373181