1030330

Appears in sequences

• Triangular numbers with every digit a triangular number.at n=26A062100
• Triangular number x such that x + reverse of x is a prime.at n=23A072387
• Triangular numbers whose digit reversal is a brilliant number (A078972).at n=22A115678
• Triangular numbers composed of digits {0,1,3}.at n=8A119035
• Number of n X n nonnegative integer arrays with upper left 0 and lower right 2n-4 and value increasing by 0 or 1 with every step right or down.at n=6A252869
• Number of nX7 nonnegative integer arrays with upper left 0 and lower right n+7-4 and value increasing by 0 or 1 with every step right or down.at n=6A252875
• Irregular triangle read by rows: T(n,d) (n >= 1, 0 <= d <= 2n-2) = number of n X n integer-valued matrices M such that M_{1,1}=0, M_{n,n}=d, and M_{(i+1),j} = M_{i,j} + (0 or 1), M_{i,(j+1)} = M_{i,j} + (0 or 1).at n=38A323849
• Irregular triangle read by rows: T(n,d) (n >= 1, 0 <= d <= 2n-2) = number of n X n integer-valued matrices M such that M_{1,1}=0, M_{n,n}=d, and M_{(i+1),j} = M_{i,j} + (0 or 1), M_{i,(j+1)} = M_{i,j} + (0 or 1).at n=46A323849