A051558 Decimal expansion of sin (Pi/2 degrees). (Of course sin (Pi/2 radians) = 1.)

0, 2, 7, 4, 1, 2, 1, 3, 3, 5, 9, 2, 0, 4, 4, 2, 9, 3, 5, 1, 7, 7, 8, 8, 4, 8, 8, 1, 9, 6, 4, 5, 2, 6, 0, 4, 5, 0, 1, 7, 8, 5, 1, 5, 2, 5, 2, 7, 2, 1, 8, 4, 1, 0, 4, 4, 0, 4, 9, 3, 6, 9, 4, 7, 5, 5, 2, 1, 8, 3, 3, 0, 8, 6, 9, 9, 0, 3, 8, 5, 9, 4, 2, 1, 5, 6, 2, 4, 1, 3, 3, 1, 6, 1, 7, 9, 4, 3, 1