230181

Appears in sequences

• a(n) = T(2n+1,n+2), T given by A026747.at n=8A026866
• Triangular numbers with property that digits alternate in parity individually as well as in concatenation with previous terms.at n=27A068889
• 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), (-1, 1, 1), (0, 1, 1), (1, -1, 0), (1, 0, -1)}.at n=10A149062